Dressing with integrated pump and releasably coupled pump actuator

Patent metadata

Field	Value
Publication number	US-12268805-B2
Application number	US-202017599229-A
Country	US
Kind code	B2
Filing date	Mar 26, 2020
Priority date	Mar 29, 2019
Publication date	Apr 8, 2025
Grant date	Apr 8, 2025

Abstract

A dressing for treating a tissue site with negative pressure including a tissue interface, a cover, a chamber wall, and a base. The cover may be adapted to be sealed to epidermis proximate the tissue site. The chamber wall may define a pump chamber, wherein the pump chamber may be adapted to be fluidly coupled to the tissue interface. The base may extend from the chamber wall, wherein the base may be fluidly sealed to the cover. The dressing may include an intake valve and an exhaust valve fluidly coupled to the pump chamber. The pump chamber may be compressed to evacuate fluid from the pump chamber through the exhaust valve. The pump chamber may then be expanded to draw’ fluid through the intake valve from the tissue interface. This supplies a negative pressure to the tissue interface which may be adapted to distribute negative pressure across the tissue site.

First claim

What is claimed is:

1. A dressing for treating a tissue site with negative pressure, the dressing comprising:
a tissue interface adapted to distribute negative pressure across the tissue site;
a cover adapted to be sealed to epidermis proximate the tissue site; and
a pump, the pump comprising:
a chamber wall having a drive surface and a flexible wall extending from the drive surface, the chamber wall defining a pump chamber, the pump chamber fluidly coupled to the tissue interface;
a base extending from the flexible wall of the chamber wall, the base fluidly sealed to the cover; and
a cantilever spring disposed within the pump chamber, the cantilever spring coupled to the base;
a frame coupled to the base, wherein the frame comprises a base portion, the cantilever spring extending from the base portion;
wherein during operation of the pump, the drive surface is configured to be cycled between an unactuated position and an actuated position, and wherein the drive surface is oriented at a first angle with respect to the base when the drive surface is in the unactuated position; and
wherein the cantilever spring is configured to return the drive surface to the unactuated position.

2. The dressing of claim 1 , wherein the chamber wall is adapted to be compressed to evacuate fluid from the pump chamber.

3. The dressing of claim 2 , further comprising an exhaust valve fluidly coupled to the pump chamber and adapted to allow fluid to be evacuated from the pump chamber if the chamber wall is compressed.

4. The dressing of claim 1 , wherein the pump chamber is adapted to expand to decrease pressure in the tissue interface.

5. The dressing of claim 1 , further comprising an intake valve between the tissue interface and the pump chamber, the intake valve adapted to fluidly couple the pump chamber and the tissue interface and adapted to allow pressure to be reduced in the tissue interface when the pump chamber is expanded.

6. The dressing of claim 5 , further comprising a liquid-air separator coupled to the intake valve and adapted to prevent liquid from entering the pump chamber from the tissue interface.

7. The dressing of claim 1 , wherein the pump chamber has a teardrop shape or a wedge shape.

8. The dressing of claim 1 , wherein the chamber wall comprises a corrugated flexible wall or a concertinaed flexible wall.

9. The dressing of claim 1 , wherein the dressing further comprises a wall extending upward from the base, wherein the wall is adapted to orient a pump actuator that is adapted to be secured to the dressing.

10. The dressing of claim 1 , wherein the cantilever spring is oriented at a second angle with respect to the base when the drive surface is in the unactuated position, and wherein the first angle and the second angle are equal.

11. The dressing of claim 1 , wherein the base portion is located in the base.

12. The dressing of claim 1 , wherein:
the base has a first side and a second side, the first side facing the cover, and the chamber wall on the second side; and
the pump further comprises a wall extending from the second side of the base away from the first side of the base, the wall proximate to a perimeter of the base and having an inner side and an outer side, wherein the inner side is perpendicular to the base and the outer side is curved.

13. A dressing for treating a tissue site with negative pressure, the dressing comprising:
a tissue interface adapted to distribute negative pressure across the tissue site;
a cover adapted to be sealed to epidermis proximate the tissue site; and
a pump, the pump comprising:
a chamber wall having a drive surface and a flexible wall extending from the drive surface, the chamber wall defining a pump chamber, the pump chamber fluidly coupled to the tissue interface;
a base extending from the flexible wall of the chamber wall, the base fluidly sealed to the cover;
a frame coupled to the base, wherein the frame comprises a first bridge, the first bridge located a distance away from the base, and the first bridge configured to cooperate with a pump actuator to releasably secure the pump actuator to the dressing; and
a cantilever spring disposed within the pump chamber, the cantilever spring coupled to the base;
wherein during operation of the pump, the drive surface is configured to be cycled between an unactuated position and an actuated position, and wherein the drive surface is oriented at a first angle with respect to the base when the drive surface is in the unactuated position; and
wherein the cantilever spring is configured to return the drive surface to the unactuated position.

14. The dressing of claim 13 , wherein:
the base has a first side and a second side, the first side facing the cover and the chamber wall on the second side;
the pump further comprises a wall extending from the second side of the base away from the first side of the base; and
the first bridge located between the chamber wall and the wall.

Assignees

• Kci Licensing Inc

Inventors

• Randolph Larry Tab
• Cinnamon Sara
• Foulstone Stefan
• Hartzell Charles
• Henze Stephanie
• Lane Robert
• Sanford Colton

Classifications

• A61F13/05

  specially adapted for use with sub-pressure or over-pressure therapy, wound drainage or wound irrigation, e.g. for use with negative-pressure wound therapy [NPWT] · CPC title

• A61M1/915

  Constructional details of the pressure distribution manifold · CPC title

• A61M2039/0646

  Duckbill-valve · CPC title

• A61M39/06

  Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof · CPC title

• A61M1/684

  bellows-type · CPC title